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cppunit_timer.h
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1 /*
2  * Copyright (c) 2006
3  * Francois Dumont
4  *
5  * This material is provided "as is", with absolutely no warranty expressed
6  * or implied. Any use is at your own risk.
7  *
8  * Permission to use or copy this software for any purpose is hereby granted
9  * without fee, provided the above notices are retained on all copies.
10  * Permission to modify the code and to distribute modified code is granted,
11  * provided the above notices are retained, and a notice that the code was
12  * modified is included with the above copyright notice.
13  *
14  */
15 
16 #ifndef CPPUNIT_TIMER_H
17 #define CPPUNIT_TIMER_H
18 
19 #if defined (_WIN32)
20 # define CPPUNIT_WIN32_TIMER
21 # include <windows.h>
22 #endif
23 
24 class Timer {
25 public:
26  Timer() {
27 #if defined (CPPUNIT_WIN32_TIMER)
28  m_start.LowPart = m_restart.LowPart = m_stop.LowPart = 0;
29  m_start.HighPart = m_restart.HighPart = m_stop.HighPart = 0;
30  QueryPerformanceFrequency(&m_frequency);
31 #endif
32  }
33 
34  void start() {
35 #if defined (CPPUNIT_WIN32_TIMER)
36  QueryPerformanceCounter(&m_start);
37 #endif
38  }
39 
40  void restart() {
41 #if defined (CPPUNIT_WIN32_TIMER)
42  QueryPerformanceCounter(&m_restart);
43  if (m_start.HighPart == 0 && m_start.LowPart == 0) {
44  m_start = m_restart;
45  }
46 #endif
47  }
48 
49  void stop() {
50 #if defined (CPPUNIT_WIN32_TIMER)
53  if ((m_stop.HighPart != 0 || m_stop.LowPart != 0) &&
54  m_restart.HighPart != 0 && m_restart.LowPart != 0) {
55  m_stop.HighPart += (stop.HighPart - m_restart.HighPart);
56  if (stop.LowPart < m_restart.LowPart) {
57  if (m_restart.LowPart - stop.LowPart > m_stop.LowPart) {
58  m_stop.HighPart -= 1;
59  }
60  m_stop.LowPart -= m_restart.LowPart - stop.LowPart;
61  }
62  else {
63  if (stop.LowPart - m_restart.LowPart > 0xFFFFFFFF - m_stop.LowPart) {
64  m_stop.HighPart += 1;
65  }
66  m_stop.LowPart += stop.LowPart - m_restart.LowPart;
67  }
68  }
69  else {
70  m_stop = stop;
71  }
72 #endif
73  }
74 
75  double elapsedMilliseconds() const {
76 #if defined (CPPUNIT_WIN32_TIMER)
77  LARGE_INTEGER elapsed;
78  elapsed.HighPart = m_stop.HighPart - m_start.HighPart;
79  elapsed.LowPart = m_stop.LowPart - m_start.LowPart;
80  return (double)elapsed.QuadPart / (double)m_frequency.QuadPart * 1000;
81 #else
82  return 0;
83 #endif
84  }
85 
86  static bool supported() {
87 #if defined (CPPUNIT_WIN32_TIMER)
88  return true;
89 #else
90  return false;
91 #endif
92  }
93 
94 private:
95 #if defined (CPPUNIT_WIN32_TIMER)
96  LARGE_INTEGER m_frequency;
97  LARGE_INTEGER m_start, m_stop, m_restart;
98 #endif
99 };
100 
101 #endif
static const char mbstate_t *static wchar_t const char mbstate_t *static const wchar_t int *static double
Definition: string.c:80
BOOL WINAPI QueryPerformanceFrequency(OUT PLARGE_INTEGER lpFrequency)
Definition: perfcnt.c:45
static bool supported()
Definition: cppunit_timer.h:86
BOOL WINAPI QueryPerformanceCounter(OUT PLARGE_INTEGER lpPerformanceCount)
Definition: perfcnt.c:23
void start()
Definition: cppunit_timer.h:34
ULONG LowPart
Definition: typedefs.h:104
void restart()
Definition: cppunit_timer.h:40
double elapsedMilliseconds() const
Definition: cppunit_timer.h:75
void stop()
Definition: cppunit_timer.h:49
LONGLONG QuadPart
Definition: typedefs.h:112